Pearl,Raymond and Clawson <br/><br/>
Variation and correlation in the crayfish 

 - Washington  Carnegie institution of Washington  1907 
 - 70p. ; 25 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Homology
<br/><br/><label>Universal Decimal Class. No.: </label>13  / JJ6